Middle school problem, Please explain very well or don't answer it.

Dante lost 35 pennies.
Mia lost 315 pennies; from the piggy bank.
For the given question.
Let Dante have total amount of x.
Then, Mia has the amount if 350 - x.
Dante lost 1/2 of his pennies = x - (1/2)x = (1/2)x.
Mia lost 1/3 of her pennies and left pennies is = (1/3)(350 - x)
Now, both had the same number of pennies.
(1/2)x = (1/3)(350 - x)
cross multiplying.
3x = 2(350 - x)
3x = 350 - 2x
5x = 350
x = 70 (Dante have 70 number of pennies)
Dante lost = (1/2)x = 70/2 = 35 pennies.
Mia lost = (1/3)(350 - x) = 315 pennies.
To know more about the fraction, here
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